--- a/src/gcc/config/rs6000/rs6000-call.c
+++ b/src/gcc/config/rs6000/rs6000-call.c
@@ -8914,7 +8914,7 @@ def_builtin (const char *name, tree type
 
   if (rs6000_builtin_decls[(int)code])
     fatal_error (input_location,
-		 "internal error: builtin function %qs already processed",
+		 "internal error: built-in function %qs already processed",
 		 name);
 
   rs6000_builtin_decls[(int)code] = t =
@@ -11412,7 +11412,7 @@ altivec_expand_builtin (tree exp, rtx ta
 	{
 	  size_t uns_fcode = (size_t) fcode;
 	  const char *name = rs6000_builtin_info[uns_fcode].name;
-	  error ("Second argument of %qs must be in the range [0, 3].", name);
+	  error ("second argument of %qs must be in the range [0, 3]", name);
 	  return expand_call (exp, target, false);
 	}
       break;
@@ -11672,7 +11672,7 @@ rs6000_invalid_builtin (enum rs6000_buil
   else if ((fnmask & RS6000_BTM_HARD_FLOAT) != 0)
     error ("%qs requires the %qs option", name, "-mhard-float");
   else if ((fnmask & RS6000_BTM_FLOAT128_HW) != 0)
-    error ("%qs requires ISA 3.0 IEEE 128-bit floating point", name);
+    error ("%qs requires ISA 3.0 IEEE 128-bit floating-point", name);
   else if ((fnmask & RS6000_BTM_FLOAT128) != 0)
     error ("%qs requires the %qs option", name, "%<-mfloat128%>");
   else if ((fnmask & (RS6000_BTM_POPCNTD | RS6000_BTM_POWERPC64))
@@ -14879,7 +14879,7 @@ builtin_function_type (machine_mode mode
 
   if (!ret_type)
     fatal_error (input_location,
-		 "internal error: builtin function %qs had an unexpected "
+		 "internal error: built-in function %qs had an unexpected "
 		 "return type %qs", name, GET_MODE_NAME (h.mode[0]));
 
   for (i = 0; i < (int) ARRAY_SIZE (arg_type); i++)
@@ -14901,7 +14901,7 @@ builtin_function_type (machine_mode mode
 
       if (!arg_type[i])
 	fatal_error (input_location,
-		     "internal error: builtin function %qs, argument %d "
+		     "internal error: built-in function %qs, argument %d "
 		     "had unexpected argument type %qs", name, i,
 		     GET_MODE_NAME (m));
     }
